dr. jayantha obeysekera discusses the regional flood control system that was designed and built by the u. s. army engineers about 50 years ago. how was this system designed to work, and why is it no longer sufficient? what, if any, is the solution for this issue?

What is the significance of the protein-lined pits? a. protein attracts other proteins needed for atp synthesis within the cell. b. protein-lined pits are able to transport one molecule at a time down the concentration gradient within the cell. c. the polarity of proteins allows other polar molecules to attach and be transported in the cell by transport channels. d. receptors within the pits allow ligands to fuse and be transported into the cell by endocytosis.